Directory · Companies O · Updated 2026-10-18
Insurance companies starting with O
Property and casualty insurers whose names start with O, with NAIC numbers, home state, how many states list each as admitted or as a surplus lines insurer, and the lines it is licensed for. Filter by line, type or state.
75 companies: 72 admitted somewhere, 12 eligible for surplus lines somewhere. Click a company for its state-by-state page.
By Sam Alishahi, independent insurance broker · A to Z
Companies O
The list
| Company | NAIC | Home state | Admitted in | Surplus lines in | Lines |
|---|---|---|---|---|---|
| O'Shaughnahill Surety & Insurance Inc. | 17007 | FL | 3 | 0 | — |
| Oak River Insurance Company | 34630 | NE | 34 | 0 | Personal auto, Equipment breakdown, Commercial auto +9 more |
| Oakwood Insurance Company | 31208 | TN | 24 | 0 | Aircraft and aviation, Personal auto, Equipment breakdown +10 more |
| Oasis Reciprocal Risk Retention Group | 13644 | VT | 1 | 0 | — |
| OBI America Insurance Company | 15645 | PA | 35 | 0 | General liability, Workers' compensation |
| OBI National Insurance Company | 14190 | PA | 35 | 0 | Personal auto, General liability, Ocean marine +3 more |
| Obsidian Insurance Company | 35602 | OH | 34 | 0 | Aircraft and aviation, Personal auto, Equipment breakdown +14 more |
| Obsidian Pacific Insurance Company | 26395 | DE | 26 | 0 | Aircraft and aviation, Personal auto, Equipment breakdown +15 more |
| Obsidian Specialty Insurance Company | 16871 | DE | 5 | 18 | Personal auto, Commercial auto, Earthquake +6 more |
| OCCIDENTAL FIRE \u0026 CASUALTY COMPANY OF NORTH CAROLINA | 23248 | NC | 35 | 0 | Personal auto, Equipment breakdown, Commercial auto +16 more |
| Ocean Harbor Casualty Insurance Company | 12360 | FL | 8 | 0 | Personal auto, Farm and crop, Homeowners +4 more |
| Ocean Marine Insurance Company Limited, The | — | UK | 2 | 10 | — |
| Oceanus Insurance Company, a Risk Retention Group | 12189 | SC | 2 | 0 | — |
| OCIL Specialty, Ltd. | — | BE | 1 | 8 | — |
| Odyssey Reinsurance Company | 23680 | CT | 29 | 0 | Aircraft and aviation, Personal auto, Equipment breakdown +16 more |
| Ohio Bar Liability Insurance Company | 37176 | OH | 1 | 0 | — |
| Ohio Casualty Insurance Company (The) | 24074 | NH | 35 | 0 | Aircraft and aviation, Personal auto, Equipment breakdown +15 more |
| Ohio Farmers Insurance Company | 24104 | OH | 30 | 0 | Aircraft and aviation, Personal auto, Equipment breakdown +16 more |
| Ohio Indemnity Company | 26565 | OH | 35 | 0 | Personal auto, Commercial auto, Credit +7 more |
| Ohio Mutual Insurance Company | 10202 | OH | 6 | 0 | — |
| Ohio Security Insurance Company | 24082 | NH | 34 | 0 | Aircraft and aviation, Personal auto, Equipment breakdown +14 more |
| Oklahoma Attorneys Mut Ins Co | 39411 | OK | 1 | 0 | General liability |
| Oklahoma Farm Bureau Mutual Insurance Company | 21563 | OK | 1 | 1 | Personal auto, Farm and crop, Homeowners +3 more |
| Oklahoma Prop & Cas Ins Co | 36382 | OK | 1 | 0 | — |
| Oklahoma Specialty Insurance Company | 14175 | OK | 6 | 17 | — |
| Oklahoma Surety Company | 23426 | OH | 3 | 0 | Personal auto, Commercial auto, Crime (burglary and theft) +7 more |
| Old American County Mutual Fire Insurance Company | 29378 | TX | 1 | 0 | Personal auto, Crime (burglary and theft), Farm and crop +3 more |
| Old American Indemnity Company | 11665 | TX | 9 | 0 | Personal auto, Equipment breakdown, Crime (burglary and theft) +8 more |
| Old Dominion Insurance Company | 40231 | FL | 11 | 0 | Personal auto, Commercial auto, Commercial package (BOP, CMP) +10 more |
| Old Glory Insurance Company | 11579 | TX | 3 | 0 | Personal auto, General liability, Workers' compensation |
| Old Guard Insurance Company | 17558 | OH | 20 | 1 | Aircraft and aviation, Personal auto, Equipment breakdown +14 more |
| Old Missouri Mutual Insurance Company | 13903 | MO | 1 | 0 | — |
| Old Reliable Casualty Company | 36625 | MO | 4 | 0 | Crime (burglary and theft), Homeowners, General liability +1 more |
| Old Republic General Insurance Corporation | 24139 | IL | 35 | 0 | Aircraft and aviation, Personal auto, Equipment breakdown +13 more |
| Old Republic Insurance Company | 24147 | PA | 35 | 0 | Aircraft and aviation, Personal auto, Equipment breakdown +20 more |
| Old Republic Security Assurance Company | 35424 | IL | 29 | 0 | Personal auto, Crime (burglary and theft), Fidelity bonds +9 more |
| Old Republic Surety Company | 40444 | WI | 26 | 0 | Personal auto, Fidelity bonds, General liability +2 more |
| Old Republic Union Insurance Company | 31143 | IL | 4 | 22 | Personal auto, Commercial auto, Commercial package (BOP, CMP) +3 more |
| Old United Casualty Company | 37060 | KS | 31 | 0 | Aircraft and aviation, Personal auto, Credit +8 more |
| Old West Mut Ins Co | 40657 | ND | 1 | 0 | — |
| Olympic Casualty Insurance Company | — | VT | 0 | 1 | — |
| Olympus Insurance Company | 12954 | FL | 1 | 0 | Commercial package (BOP, CMP), Homeowners, Inland marine +2 more |
| Omaha National Casualty Company | 32107 | CA | 2 | 0 | General liability, Ocean marine, Commercial property (fire and allied lines) +1 more |
| Omaha National Insurance Company | 16219 | NE | 26 | 0 | Personal auto, Equipment breakdown, Crime (burglary and theft) +6 more |
| Omni Indemnity Company | 34940 | IL | 4 | 0 | Personal auto, General liability, Commercial property (fire and allied lines) +1 more |
| Omni Insurance Company | 39098 | IL | 6 | 0 | Personal auto, General liability |
| OMNIA Risk Retention Group, Inc. | 16989 | SC | 4 | 0 | — |
| OMS National Insurance Company | 44121 | IL | 7 | 0 | General liability, Medical malpractice, Professional liability (E&O) |
| One Alliance North America Insurance Company | 10759 | TX | 13 | 0 | Personal auto, Commercial package (BOP, CMP), Crime (burglary and theft) +8 more |
| Onebeacon Select Insurance Company | — | — | 0 | 1 | — |
| Onstar National Insurance Company | — | IL | 1 | 0 | — |
| Ontario Insurance Company | 22870 | New York | 1 | 0 | — |
| Ontario Reinsurance Company, LTD. | 11040 | GA | 1 | 0 | Commercial property (fire and allied lines) |
| Ooida RRG Inc | 10353 | VT | 6 | 0 | Personal auto, Commercial auto, General liability |
| Openly Insurance Company | 33006 | SC | 10 | 0 | General liability, Ocean marine, Commercial property (fire and allied lines) +2 more |
| Ophthalmic Mutual Insurance Company (A Risk Retention Group) | 44105 | VT | 8 | 0 | General liability, Medical malpractice, Professional liability (E&O) |
| Orange County Medical Reciprocal Insurance Company, a Risk Retention Group | 12183 | AZ | 1 | 0 | — |
| ORCA RRG Inc | 17368 | MT | 1 | 0 | Medical malpractice |
| Ordinary Mutual a Risk Retention Group Corporation (The) | 10171 | VT | 1 | 0 | — |
| Oregon Automobile Insurance Company | 23922 | OR | 3 | 0 | Fidelity bonds, General liability, Ocean marine +3 more |
| Oregon Mutual Insurance Company | 14907 | OR | 4 | 0 | Personal auto, Equipment breakdown, Commercial auto +12 more |
| Orion 180 Insurance Company | 17320 | IN | 2 | 9 | Homeowners, Commercial property (fire and allied lines) |
| Orion Indemnity Company | 13250 | CA | 3 | 0 | Personal auto |
| Orion180 Select Insurance Company | 17438 | IN | 6 | 0 | Personal auto, Equipment breakdown, Farm and crop +5 more |
| Oriska Insurance Company | 30175 | New York | 2 | 0 | Surety bonds |
| Osage County Farmers Mutual Aid Association | 13904 | MO | 1 | 0 | — |
| Osprey Re Fru Sutton Carnegie Captive Insurance, PC | — | — | 1 | 0 | General liability, Commercial property (fire and allied lines), Surety bonds +1 more |
| Oswego County Mutual Insurance Company | 43850 | New York | 1 | 0 | — |
| Otsego County Patrons Co-Operative Fire Relief Association | 30350 | New York | 1 | 0 | — |
| Otsego Mutual Fire Insurance Company | 14915 | New York | 1 | 0 | — |
| Overdrive Risk Retention Group, LLC | 16822 | TN | 7 | 0 | Personal auto, Commercial auto, General liability |
| Owner Operator Services, Inc | — | — | 0 | 1 | — |
| Owners Insurance Company | 32700 | OH | 18 | 0 | Personal auto, Equipment breakdown, Commercial auto +14 more |
| Owners Insurance Company | — | OH | 2 | 0 | — |
| Ozark Specialty Insurance Comnpany | 17731 | MO | 3 | 15 | — |
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